Optical transceiver precisely setting the transmission rate of the output optical signal
First Claim
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1. An optical transmitter, comprising:
- a rate adjustor configured to receive a reference clock and an input data and to output an output data synchronized with the reference clock;
an electrical-to-optical converter configured to receive the output data from the rate adjustor, to convert the output data into a corresponding optical data and to output the optical data;
a voltage-controlled oscillator configured to output the reference clock with a frequency controlled by a control signal; and
a compensating unit including a temperature sensor to sense a temperature of the voltage-controlled oscillator, the compensating unit outputting the control signal based on the temperature sensed by the temperature sensor, wherein the frequency of the reference clock output from the voltage-controlled-oscillator is compensated for the temperature.
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Abstract
The present invention is to provide an optical transceiver that enhances and keeps the exactness of the transmission rate of the optical signal to be transmitted. The transceiver includes a rate adjustor, where the de-stuffing unit, the FIFO memory and the stuffing unit. The input electrical data are temporarily stored in FIFO memory synchronized with the clock extracted from the input data. The stored data are read out by the clock highly stabilized by the voltage controlled oscillator (VCO). The control signal for the VCO is compensated to the temperature.
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Citations
8 Claims
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1. An optical transmitter, comprising:
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a rate adjustor configured to receive a reference clock and an input data and to output an output data synchronized with the reference clock;
an electrical-to-optical converter configured to receive the output data from the rate adjustor, to convert the output data into a corresponding optical data and to output the optical data;
a voltage-controlled oscillator configured to output the reference clock with a frequency controlled by a control signal; and
a compensating unit including a temperature sensor to sense a temperature of the voltage-controlled oscillator, the compensating unit outputting the control signal based on the temperature sensed by the temperature sensor, wherein the frequency of the reference clock output from the voltage-controlled-oscillator is compensated for the temperature. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An optical transceiver, comprising:
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an optical transmitter to receive an electrical input data and to output an optical data corresponding to the electrical data, the optical transmitter including a rate adjustor configured to receive a reference clock and the electrical input data and to output an output electrical data synchronized with the reference clock, an electrical-to-optical converter configured to receive the output electrical data from the rate adjustor, to convert the output electrical data into a corresponding optical data and to output the optical data, a voltage-controlled oscillator configured to output the reference clock controlled by a control signal, and a compensating including a temperature sensor to sense the temperature of the voltage-controlled oscillator, the compensating unit outputting the control signal with a frequency depending on the temperature sensed by the temperature sensor; and
an optical receiver to receive an optical input data and to output an electrical output data corresponding to the optical input data, wherein the control signal applied to the voltage-controlled-oscillator depends on an output of the temperature sensor. - View Dependent Claims (8)
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Specification